The Solar System

Answer Key Below

Below you can find the answers to "The Solar System" -- just scroll down and find which ones you got wrong. Then you can explore the rest of the site.

  1. How many Earths can fit inside the Sun?
    • 500
    • 10,000
    • 1 million
    • 500,000
  2. A planet is a(n)...
    • large body that revolves, or travels, around the Earth.
    • large body that revolves, or travels, around the Sun.
    • object at the center of the universe.
    • small chunk of rock that orbits the Sun.
  3. The inner planets are called gas giants.
    • True
    • False
  4. Earth is different from all other planets. Why is this?
    • Earth is a rocky planet.
    • Earth is an outer planet.
    • Earth supports life.
    • Earth has an atmosphere.
  5. Choice the wrong statement.
    • The Sun is the main source of energy for Earth.
    • The moving plates cause the Earth's surface to keep changing.
    • Earth's gravity holds the atmosphere close to Earth.
    • All of the Sun's light coming towards Earth reaches Earth's surface.
  6. What is one thing that the gas giants (the outer planets) have in common?
    • They have no moons.
    • They have rings.
    • They have no atmosphere.
    • They are closer to the Sun than Earth.
  7. Pluto is made of gas.
    • True
    • False
  8. Uranus is the only planet to rotate on its side.
    • True
    • False
  9. What is at the center of the Solar System?
    • The asteroid belt.
    • Earth
    • The Moon.
    • The Sun.
  10. Why is Earth called the "blue planet?"
    • There is a lot of rust in the soil.
    • Gravity pulled in blue objects from the universe.
    • It has oceans of liquid water.
    • The sky is blue.

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